Aha!Go: Home exchange and vacation rentals. Intial use free, small charge after you actually make an exchange. Planning tools include a true distance finder.
Blue-Home: Listings for home and apartment exchange worldwide. Free search. In English, French and Spanish.
Home Exchange International: Worldwide home exchange and apartment exchange for singles, single parents, couples and small families and vacation rental service.
HomeInvite.com: Global home exchange organization that offers properties for holiday home exchange or vacation rental.
Interline Homeswaps: Free site that lists your home for swapping with others in the travel industry.
International Home Exchange Network: Global home exchange directory and membership service.
International Innkeepers Exchange: Exchange between Innkeepers around the world.
Prof2000: Home exchange for teachers. Includes penpals, host families and a travel pool. In English, German, French and Spanish.
The Traveler Exchange: Free online hospitality exchange. Registration required.
Trippolis: Home exchange site for regions around the world. Forum, chat and FAQ.